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CONSTRUCTION UPDATE: Former Kimberly-Clark Mill Site Cleanup (update as of June 10, 2020)

Date: Jun 10, 2020
ShowImageThis provides a brief construction update regarding the State-regulated environmental cleanup work taking place at the former Kimberly-Clark mill site by the previous property owner. As you may recall, cleanup kicked off in March 2020 but paused work in April in response to the statewide Stay Home, Stay Healthy order to slow the spread of COVID-19. Kimberly-Clark’s contractor, Interwest Construction Inc., resumed work in early-May and the project remains on schedule for a December 31, 2020 completion date.


Since commencing remediation of the site, the work thus far has consisted of decommissioning of over a dozen shoreline pipes. This activity included:

  • Locating the pipes by excavation;
  • Cleaning the insides of the pipes using a Vactor truck;
  • Video inspecting the pipes; and
  • Plugging the pipes, either with controlled density fill (CDF) or removing the pipes.

showimage (1)This work will continue for approximately the next two weeks, with impacted soil and crushed material removal to follow.

The Construction Notice the Port issued in late-February includes additional project information, including scope and timeline, which still holds today. 

As cleanup work continues forward, the Port is working on parallel paths to ready the site for Maritime Industrial Expansion to support near-term maritime operations and jobs, including construction of an approximate 33-acre marine shipping terminal. The construction plan integrates with the final cleanup of the uplands, which will provide an extensive low permeability cap that will protect groundwater quality and the Puget Sound. Learn more at

Questions? Concerns? Contact Catherine Soper at 425.388.0680 or by e-mail at